Presence of A. actinomyctemcomitans (Aa) with different serotypes, cdt-genotype and disease progression.

Odds ratio (OR) showing the association of progression of attachment loss (AL) ≥3 mm after a two-year follow-up period in relation to the carrier status of Aa.OR, odds ratio; CI, confidence interval; AL, attachment loss. Significance (p*The reference group. Reference is the progression of AL in individuals that were Aa-negative.